Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = sin-1(x2 + y2)
A. Domain: all points in the xy-plane; range: all real numbers; level curves: circles with centers at (0, 0)
B. Domain: all points in the xy-plane satisfying x2 + y2 ? 1; range: real numbers - 
? z ? 
; level curves: circles with centers at (0,0) and radii r, 0 < r ? 1
C. Domain: all points in the xy-plane; range: real numbers - 
? z ? 
; level curves: circles with centers at (0, 0)
D. Domain: all points in the xy-plane satisfying x2 + y2 ? 1; range: real numbers - 
? z ? 
; level curves: circles with centers at (0, 0)
Answer: B
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Use reduction formulas to evaluate the integral.
A. 
sec 3x tan 3x + 
ln
+ C
B. 
sec2 3x tan 3x + 
ln
+ C
C. 
sec 3x tan 3x + 
ln
+ C
D. 
sec 3x tan 3x - 
ln
+ C
Solve the problem.The following table shows the March electric bill of selected homes in Atlanta along with the number of rooms in each home. 
Determine whether there is a correlation between the number of rooms and the electric bills at 
A. No B. Yes
Write the number in standard form.6 
A. 3
+ 3i
B. -3
- 3i
C. -3
+ 3i
D. -6
- 6i
Solve the problem.The volume of a box is 3p4 + 10p3 + 8p2. The height is p and the width is p + 2. What is the length?
A. 3p + 4 B. 3p2 + 4p C. 3p3 + 4p2 D. p2 + 4